Go to a place called Hobby Giant. They are way out on the west end of Denver I beilieve I70 and Wadsworth BLVD. Check the yellow pages when you get there. another good shop is Colpar hobbies in Aurora. They are on Havana Blvd. Check the yellow pages for them too.

Colpar hobbies on Havanna is mainly planes. Stay away from it if you want heli parts or knowledge. Hobby Giant is the best I have found in the Denver area. To be more specific it is on Old Wadsworth and I-70.